Stabilized compositions and process for producing same

A stabilized composition comprising:

• an organic material to be stabilized;
• and
• a stabilizing amount of a resin masterbatch system provided as closed end pellets, said pellets comprising:
• a core material comprising a stabilizing amount of at least one stabilizer additive selected from the group consisting of a hindered amine light stabilizers (HALS), an organic phosphite or phosphonite, a hindered phenol, a chromane, an ultraviolet light (UV) absorber, a hindered benzoate, a hydroxylamine, a tertiary amine oxide, and a free radical polymerization inhibitor;
• and
• an outer layer comprising a thermoplastic polymer, wherein the outer layer has a thickness from 0.001 mm to 1 cm, and wherein the outer layer is co-extruded with and encapsulates said core material such that the pellets are sealed at each end and are leak free,
• wherein the core material is solid, semi-solid, waxy, or liquid at 25° C., and is from 0.01 wt. % to 65 wt. %, based on a total weight of the stabilized composition;
• and
• wherein the thermoplastic polymer of the outer layer is compatible with the organic material to be stabilized.